softfloat: Add flags specific to Inf / Inf and 0 / 0

PowerPC has these flags, and it's easier to compute them here
than after the fact.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211119160502.17432-5-richard.henderson@linaro.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
diff --git a/include/fpu/softfloat-types.h b/include/fpu/softfloat-types.h
index 56b4cf7..5a9671e 100644
--- a/include/fpu/softfloat-types.h
+++ b/include/fpu/softfloat-types.h
@@ -154,6 +154,8 @@
     float_flag_output_denormal = 0x0040,
     float_flag_invalid_isi     = 0x0080,  /* inf - inf */
     float_flag_invalid_imz     = 0x0100,  /* inf * 0 */
+    float_flag_invalid_idi     = 0x0200,  /* inf / inf */
+    float_flag_invalid_zdz     = 0x0400,  /* 0 / 0 */
 };
 
 /*